1 /*
2 * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/javaClasses.hpp"
27 #include "classfile/symbolTable.hpp"
28 #include "classfile/systemDictionary.hpp"
29 #include "classfile/verifier.hpp"
30 #include "classfile/vmSymbols.hpp"
31 #include "interpreter/linkResolver.hpp"
32 #include "memory/oopFactory.hpp"
33 #include "memory/resourceArea.hpp"
34 #include "memory/universe.inline.hpp"
35 #include "oops/instanceKlass.hpp"
36 #include "oops/objArrayKlass.hpp"
37 #include "oops/objArrayOop.hpp"
38 #include "prims/jvm.h"
39 #include "prims/jvmtiExport.hpp"
40 #include "runtime/arguments.hpp"
41 #include "runtime/handles.inline.hpp"
42 #include "runtime/javaCalls.hpp"
43 #include "runtime/reflection.hpp"
44 #include "runtime/reflectionUtils.hpp"
45 #include "runtime/signature.hpp"
46 #include "runtime/vframe.hpp"
47
48 static void trace_class_resolution(Klass* to_class) {
49 ResourceMark rm;
50 int line_number = -1;
51 const char * source_file = NULL;
52 Klass* caller = NULL;
53 JavaThread* jthread = JavaThread::current();
54 if (jthread->has_last_Java_frame()) {
55 vframeStream vfst(jthread);
56 // skip over any frames belonging to java.lang.Class
57 while (!vfst.at_end() &&
58 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class()) {
59 vfst.next();
60 }
61 if (!vfst.at_end()) {
62 // this frame is a likely suspect
63 caller = vfst.method()->method_holder();
64 line_number = vfst.method()->line_number_from_bci(vfst.bci());
65 Symbol* s = vfst.method()->method_holder()->source_file_name();
66 if (s != NULL) {
67 source_file = s->as_C_string();
68 }
69 }
70 }
71 if (caller != NULL) {
72 const char * from = caller->external_name();
73 const char * to = to_class->external_name();
74 // print in a single call to reduce interleaving between threads
75 if (source_file != NULL) {
76 tty->print("RESOLVE %s %s %s:%d (reflection)\n", from, to, source_file, line_number);
77 } else {
78 tty->print("RESOLVE %s %s (reflection)\n", from, to);
79 }
80 }
81 }
82
83
84 oop Reflection::box(jvalue* value, BasicType type, TRAPS) {
85 if (type == T_VOID) {
86 return NULL;
87 }
88 if (type == T_OBJECT || type == T_ARRAY) {
89 // regular objects are not boxed
90 return (oop) value->l;
91 }
92 oop result = java_lang_boxing_object::create(type, value, CHECK_NULL);
93 if (result == NULL) {
94 THROW_(vmSymbols::java_lang_IllegalArgumentException(), result);
95 }
96 return result;
97 }
98
99
100 BasicType Reflection::unbox_for_primitive(oop box, jvalue* value, TRAPS) {
101 if (box == NULL) {
102 THROW_(vmSymbols::java_lang_IllegalArgumentException(), T_ILLEGAL);
103 }
104 return java_lang_boxing_object::get_value(box, value);
105 }
106
107 BasicType Reflection::unbox_for_regular_object(oop box, jvalue* value) {
108 // Note: box is really the unboxed oop. It might even be a Short, etc.!
109 value->l = (jobject) box;
110 return T_OBJECT;
111 }
112
113
114 void Reflection::widen(jvalue* value, BasicType current_type, BasicType wide_type, TRAPS) {
115 assert(wide_type != current_type, "widen should not be called with identical types");
116 switch (wide_type) {
117 case T_BOOLEAN:
118 case T_BYTE:
119 case T_CHAR:
120 break; // fail
121 case T_SHORT:
122 switch (current_type) {
123 case T_BYTE:
124 value->s = (jshort) value->b;
125 return;
126 }
127 break; // fail
128 case T_INT:
129 switch (current_type) {
130 case T_BYTE:
131 value->i = (jint) value->b;
132 return;
133 case T_CHAR:
134 value->i = (jint) value->c;
135 return;
136 case T_SHORT:
137 value->i = (jint) value->s;
138 return;
139 }
140 break; // fail
141 case T_LONG:
142 switch (current_type) {
143 case T_BYTE:
144 value->j = (jlong) value->b;
145 return;
146 case T_CHAR:
147 value->j = (jlong) value->c;
148 return;
149 case T_SHORT:
150 value->j = (jlong) value->s;
151 return;
152 case T_INT:
153 value->j = (jlong) value->i;
154 return;
155 }
156 break; // fail
157 case T_FLOAT:
158 switch (current_type) {
159 case T_BYTE:
160 value->f = (jfloat) value->b;
161 return;
162 case T_CHAR:
163 value->f = (jfloat) value->c;
164 return;
165 case T_SHORT:
166 value->f = (jfloat) value->s;
167 return;
168 case T_INT:
169 value->f = (jfloat) value->i;
170 return;
171 case T_LONG:
172 value->f = (jfloat) value->j;
173 return;
174 }
175 break; // fail
176 case T_DOUBLE:
177 switch (current_type) {
178 case T_BYTE:
179 value->d = (jdouble) value->b;
180 return;
181 case T_CHAR:
182 value->d = (jdouble) value->c;
183 return;
184 case T_SHORT:
185 value->d = (jdouble) value->s;
186 return;
187 case T_INT:
188 value->d = (jdouble) value->i;
189 return;
190 case T_FLOAT:
191 value->d = (jdouble) value->f;
192 return;
193 case T_LONG:
194 value->d = (jdouble) value->j;
195 return;
196 }
197 break; // fail
198 default:
199 break; // fail
200 }
201 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
202 }
203
204
205 BasicType Reflection::array_get(jvalue* value, arrayOop a, int index, TRAPS) {
206 if (!a->is_within_bounds(index)) {
207 THROW_(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), T_ILLEGAL);
208 }
209 if (a->is_objArray()) {
210 value->l = (jobject) objArrayOop(a)->obj_at(index);
211 return T_OBJECT;
212 } else {
213 assert(a->is_typeArray(), "just checking");
214 BasicType type = TypeArrayKlass::cast(a->klass())->element_type();
215 switch (type) {
216 case T_BOOLEAN:
217 value->z = typeArrayOop(a)->bool_at(index);
218 break;
219 case T_CHAR:
220 value->c = typeArrayOop(a)->char_at(index);
221 break;
222 case T_FLOAT:
223 value->f = typeArrayOop(a)->float_at(index);
224 break;
225 case T_DOUBLE:
226 value->d = typeArrayOop(a)->double_at(index);
227 break;
228 case T_BYTE:
229 value->b = typeArrayOop(a)->byte_at(index);
230 break;
231 case T_SHORT:
232 value->s = typeArrayOop(a)->short_at(index);
233 break;
234 case T_INT:
235 value->i = typeArrayOop(a)->int_at(index);
236 break;
237 case T_LONG:
238 value->j = typeArrayOop(a)->long_at(index);
239 break;
240 default:
241 return T_ILLEGAL;
242 }
243 return type;
244 }
245 }
246
247
248 void Reflection::array_set(jvalue* value, arrayOop a, int index, BasicType value_type, TRAPS) {
249 if (!a->is_within_bounds(index)) {
250 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
251 }
252 if (a->is_objArray()) {
253 if (value_type == T_OBJECT) {
254 oop obj = (oop) value->l;
255 if (obj != NULL) {
256 Klass* element_klass = ObjArrayKlass::cast(a->klass())->element_klass();
257 if (!obj->is_a(element_klass)) {
258 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "array element type mismatch");
259 }
260 }
261 objArrayOop(a)->obj_at_put(index, obj);
262 }
263 } else {
264 assert(a->is_typeArray(), "just checking");
265 BasicType array_type = TypeArrayKlass::cast(a->klass())->element_type();
266 if (array_type != value_type) {
267 // The widen operation can potentially throw an exception, but cannot block,
268 // so typeArrayOop a is safe if the call succeeds.
269 widen(value, value_type, array_type, CHECK);
270 }
271 switch (array_type) {
272 case T_BOOLEAN:
273 typeArrayOop(a)->bool_at_put(index, value->z);
274 break;
275 case T_CHAR:
276 typeArrayOop(a)->char_at_put(index, value->c);
277 break;
278 case T_FLOAT:
279 typeArrayOop(a)->float_at_put(index, value->f);
280 break;
281 case T_DOUBLE:
282 typeArrayOop(a)->double_at_put(index, value->d);
283 break;
284 case T_BYTE:
285 typeArrayOop(a)->byte_at_put(index, value->b);
286 break;
287 case T_SHORT:
288 typeArrayOop(a)->short_at_put(index, value->s);
289 break;
290 case T_INT:
291 typeArrayOop(a)->int_at_put(index, value->i);
292 break;
293 case T_LONG:
294 typeArrayOop(a)->long_at_put(index, value->j);
295 break;
296 default:
297 THROW(vmSymbols::java_lang_IllegalArgumentException());
298 }
299 }
300 }
301
302
303 Klass* Reflection::basic_type_mirror_to_arrayklass(oop basic_type_mirror, TRAPS) {
304 assert(java_lang_Class::is_primitive(basic_type_mirror), "just checking");
305 BasicType type = java_lang_Class::primitive_type(basic_type_mirror);
306 if (type == T_VOID) {
307 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
308 } else {
309 return Universe::typeArrayKlassObj(type);
310 }
311 }
312
313
314 oop Reflection:: basic_type_arrayklass_to_mirror(Klass* basic_type_arrayklass, TRAPS) {
315 BasicType type = TypeArrayKlass::cast(basic_type_arrayklass)->element_type();
316 return Universe::java_mirror(type);
317 }
318
319
320 arrayOop Reflection::reflect_new_array(oop element_mirror, jint length, TRAPS) {
321 if (element_mirror == NULL) {
322 THROW_0(vmSymbols::java_lang_NullPointerException());
323 }
324 if (length < 0) {
325 THROW_0(vmSymbols::java_lang_NegativeArraySizeException());
326 }
327 if (java_lang_Class::is_primitive(element_mirror)) {
328 Klass* tak = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL);
329 return TypeArrayKlass::cast(tak)->allocate(length, THREAD);
330 } else {
331 Klass* k = java_lang_Class::as_Klass(element_mirror);
332 if (k->oop_is_array() && ArrayKlass::cast(k)->dimension() >= MAX_DIM) {
333 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
334 }
335 return oopFactory::new_objArray(k, length, THREAD);
336 }
337 }
338
339
340 arrayOop Reflection::reflect_new_multi_array(oop element_mirror, typeArrayOop dim_array, TRAPS) {
341 assert(dim_array->is_typeArray(), "just checking");
342 assert(TypeArrayKlass::cast(dim_array->klass())->element_type() == T_INT, "just checking");
343
344 if (element_mirror == NULL) {
345 THROW_0(vmSymbols::java_lang_NullPointerException());
346 }
347
348 int len = dim_array->length();
349 if (len <= 0 || len > MAX_DIM) {
350 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
351 }
352
353 jint dimensions[MAX_DIM]; // C array copy of intArrayOop
354 for (int i = 0; i < len; i++) {
355 int d = dim_array->int_at(i);
356 if (d < 0) {
357 THROW_0(vmSymbols::java_lang_NegativeArraySizeException());
358 }
359 dimensions[i] = d;
360 }
361
362 Klass* klass;
363 int dim = len;
364 if (java_lang_Class::is_primitive(element_mirror)) {
365 klass = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL);
366 } else {
367 klass = java_lang_Class::as_Klass(element_mirror);
368 if (klass->oop_is_array()) {
369 int k_dim = ArrayKlass::cast(klass)->dimension();
370 if (k_dim + len > MAX_DIM) {
371 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
372 }
373 dim += k_dim;
374 }
375 }
376 klass = klass->array_klass(dim, CHECK_NULL);
377 oop obj = ArrayKlass::cast(klass)->multi_allocate(len, dimensions, CHECK_NULL);
378 assert(obj->is_array(), "just checking");
379 return arrayOop(obj);
380 }
381
382
383 oop Reflection::array_component_type(oop mirror, TRAPS) {
384 if (java_lang_Class::is_primitive(mirror)) {
385 return NULL;
386 }
387
388 Klass* klass = java_lang_Class::as_Klass(mirror);
389 if (!klass->oop_is_array()) {
390 return NULL;
391 }
392
393 oop result = ArrayKlass::cast(klass)->component_mirror();
394 #ifdef ASSERT
395 oop result2 = NULL;
396 if (ArrayKlass::cast(klass)->dimension() == 1) {
397 if (klass->oop_is_typeArray()) {
398 result2 = basic_type_arrayklass_to_mirror(klass, CHECK_NULL);
399 } else {
400 result2 = ObjArrayKlass::cast(klass)->element_klass()->java_mirror();
401 }
402 } else {
403 Klass* lower_dim = ArrayKlass::cast(klass)->lower_dimension();
404 assert(lower_dim->oop_is_array(), "just checking");
405 result2 = lower_dim->java_mirror();
406 }
407 assert(result == result2, "results must be consistent");
408 #endif //ASSERT
409 return result;
410 }
411
412
413 bool Reflection::reflect_check_access(Klass* field_class, AccessFlags acc, Klass* target_class, bool is_method_invoke, TRAPS) {
414 // field_class : declaring class
415 // acc : declared field access
416 // target_class : for protected
417
418 // Check if field or method is accessible to client. Throw an
419 // IllegalAccessException and return false if not.
420
421 // The "client" is the class associated with the nearest real frame
422 // getCallerClass already skips Method.invoke frames, so pass 0 in
423 // that case (same as classic).
424 ResourceMark rm(THREAD);
425 assert(THREAD->is_Java_thread(), "sanity check");
426 Klass* client_class = ((JavaThread *)THREAD)->security_get_caller_class(is_method_invoke ? 0 : 1);
427
428 if (client_class != field_class) {
429 if (!verify_class_access(client_class, field_class, false)
430 || !verify_field_access(client_class,
431 field_class,
432 field_class,
433 acc,
434 false)) {
435 THROW_(vmSymbols::java_lang_IllegalAccessException(), false);
436 }
437 }
438
439 // Additional test for protected members: JLS 6.6.2
440
441 if (acc.is_protected()) {
442 if (target_class != client_class) {
443 if (!is_same_class_package(client_class, field_class)) {
444 if (!target_class->is_subclass_of(client_class)) {
445 THROW_(vmSymbols::java_lang_IllegalAccessException(), false);
446 }
447 }
448 }
449 }
450
451 // Passed all tests
452 return true;
453 }
454
455
456 bool Reflection::verify_class_access(Klass* current_class, Klass* new_class, bool classloader_only) {
457 // Verify that current_class can access new_class. If the classloader_only
458 // flag is set, we automatically allow any accesses in which current_class
459 // doesn't have a classloader.
460 if ((current_class == NULL) ||
461 (current_class == new_class) ||
462 (new_class->is_public()) ||
463 is_same_class_package(current_class, new_class)) {
464 return true;
465 }
466 // New (1.4) reflection implementation. Allow all accesses from
467 // sun/reflect/MagicAccessorImpl subclasses to succeed trivially.
468 if ( JDK_Version::is_gte_jdk14x_version()
469 && UseNewReflection
470 && current_class->is_subclass_of(SystemDictionary::reflect_MagicAccessorImpl_klass())) {
471 return true;
472 }
473
474 return can_relax_access_check_for(current_class, new_class, classloader_only);
475 }
476
477 static bool under_host_klass(InstanceKlass* ik, Klass* host_klass) {
478 DEBUG_ONLY(int inf_loop_check = 1000 * 1000 * 1000);
479 for (;;) {
480 Klass* hc = (Klass*) ik->host_klass();
481 if (hc == NULL) return false;
482 if (hc == host_klass) return true;
483 ik = InstanceKlass::cast(hc);
484
485 // There's no way to make a host class loop short of patching memory.
486 // Therefore there cannot be a loop here unless there's another bug.
487 // Still, let's check for it.
488 assert(--inf_loop_check > 0, "no host_klass loop");
489 }
490 }
491
492 bool Reflection::can_relax_access_check_for(
493 Klass* accessor, Klass* accessee, bool classloader_only) {
494 InstanceKlass* accessor_ik = InstanceKlass::cast(accessor);
495 InstanceKlass* accessee_ik = InstanceKlass::cast(accessee);
496
497 // If either is on the other's host_klass chain, access is OK,
498 // because one is inside the other.
499 if (under_host_klass(accessor_ik, accessee) ||
500 under_host_klass(accessee_ik, accessor))
501 return true;
502
503 if ((RelaxAccessControlCheck &&
504 accessor_ik->major_version() < Verifier::NO_RELAX_ACCESS_CTRL_CHECK_VERSION &&
505 accessee_ik->major_version() < Verifier::NO_RELAX_ACCESS_CTRL_CHECK_VERSION) ||
506 (accessor_ik->major_version() < Verifier::STRICTER_ACCESS_CTRL_CHECK_VERSION &&
507 accessee_ik->major_version() < Verifier::STRICTER_ACCESS_CTRL_CHECK_VERSION)) {
508 return classloader_only &&
509 Verifier::relax_verify_for(accessor_ik->class_loader()) &&
510 accessor_ik->protection_domain() == accessee_ik->protection_domain() &&
511 accessor_ik->class_loader() == accessee_ik->class_loader();
512 } else {
513 return false;
514 }
515 }
516
517 bool Reflection::verify_field_access(Klass* current_class,
518 Klass* resolved_class,
519 Klass* field_class,
520 AccessFlags access,
521 bool classloader_only,
522 bool protected_restriction) {
523 // Verify that current_class can access a field of field_class, where that
524 // field's access bits are "access". We assume that we've already verified
525 // that current_class can access field_class.
526 //
527 // If the classloader_only flag is set, we automatically allow any accesses
528 // in which current_class doesn't have a classloader.
529 //
530 // "resolved_class" is the runtime type of "field_class". Sometimes we don't
531 // need this distinction (e.g. if all we have is the runtime type, or during
532 // class file parsing when we only care about the static type); in that case
533 // callers should ensure that resolved_class == field_class.
534 //
535 if ((current_class == NULL) ||
536 (current_class == field_class) ||
537 access.is_public()) {
538 return true;
539 }
540
541 Klass* host_class = current_class;
542 while (host_class->oop_is_instance() &&
543 InstanceKlass::cast(host_class)->is_anonymous()) {
544 Klass* next_host_class = InstanceKlass::cast(host_class)->host_klass();
545 if (next_host_class == NULL) break;
546 host_class = next_host_class;
547 }
548 if (host_class == field_class) {
549 return true;
550 }
551
552 if (access.is_protected()) {
553 if (!protected_restriction) {
554 // See if current_class (or outermost host class) is a subclass of field_class
555 // An interface may not access protected members of j.l.Object
556 if (!host_class->is_interface() && host_class->is_subclass_of(field_class)) {
557 if (access.is_static() || // static fields are ok, see 6622385
558 current_class == resolved_class ||
559 field_class == resolved_class ||
560 host_class->is_subclass_of(resolved_class) ||
561 resolved_class->is_subclass_of(host_class)) {
562 return true;
563 }
564 }
565 }
566 }
567
568 if (!access.is_private() && is_same_class_package(current_class, field_class)) {
569 return true;
570 }
571
572 // New (1.4) reflection implementation. Allow all accesses from
573 // sun/reflect/MagicAccessorImpl subclasses to succeed trivially.
574 if ( JDK_Version::is_gte_jdk14x_version()
575 && UseNewReflection
576 && current_class->is_subclass_of(SystemDictionary::reflect_MagicAccessorImpl_klass())) {
577 return true;
578 }
579
580 return can_relax_access_check_for(
581 current_class, field_class, classloader_only);
582 }
583
584
585 bool Reflection::is_same_class_package(Klass* class1, Klass* class2) {
586 return InstanceKlass::cast(class1)->is_same_class_package(class2);
587 }
588
589 bool Reflection::is_same_package_member(Klass* class1, Klass* class2, TRAPS) {
590 return InstanceKlass::cast(class1)->is_same_package_member(class2, THREAD);
591 }
592
593
594 // Checks that the 'outer' klass has declared 'inner' as being an inner klass. If not,
595 // throw an incompatible class change exception
596 // If inner_is_member, require the inner to be a member of the outer.
597 // If !inner_is_member, require the inner to be anonymous (a non-member).
598 // Caller is responsible for figuring out in advance which case must be true.
599 void Reflection::check_for_inner_class(instanceKlassHandle outer, instanceKlassHandle inner,
600 bool inner_is_member, TRAPS) {
601 InnerClassesIterator iter(outer);
602 constantPoolHandle cp (THREAD, outer->constants());
603 for (; !iter.done(); iter.next()) {
604 int ioff = iter.inner_class_info_index();
605 int ooff = iter.outer_class_info_index();
606
607 if (inner_is_member && ioff != 0 && ooff != 0) {
608 Klass* o = cp->klass_at(ooff, CHECK);
609 if (o == outer()) {
610 Klass* i = cp->klass_at(ioff, CHECK);
611 if (i == inner()) {
612 return;
613 }
614 }
615 }
616 if (!inner_is_member && ioff != 0 && ooff == 0 &&
617 cp->klass_name_at_matches(inner, ioff)) {
618 Klass* i = cp->klass_at(ioff, CHECK);
619 if (i == inner()) {
620 return;
621 }
622 }
623 }
624
625 // 'inner' not declared as an inner klass in outer
626 ResourceMark rm(THREAD);
627 Exceptions::fthrow(
628 THREAD_AND_LOCATION,
629 vmSymbols::java_lang_IncompatibleClassChangeError(),
630 "%s and %s disagree on InnerClasses attribute",
631 outer->external_name(),
632 inner->external_name()
633 );
634 }
635
636 // Utility method converting a single SignatureStream element into java.lang.Class instance
637
638 oop get_mirror_from_signature(methodHandle method, SignatureStream* ss, TRAPS) {
639 switch (ss->type()) {
640 default:
641 assert(ss->type() != T_VOID || ss->at_return_type(), "T_VOID should only appear as return type");
642 return java_lang_Class::primitive_mirror(ss->type());
643 case T_OBJECT:
644 case T_ARRAY:
645 Symbol* name = ss->as_symbol(CHECK_NULL);
646 oop loader = method->method_holder()->class_loader();
647 oop protection_domain = method->method_holder()->protection_domain();
648 Klass* k = SystemDictionary::resolve_or_fail(
649 name,
650 Handle(THREAD, loader),
651 Handle(THREAD, protection_domain),
652 true, CHECK_NULL);
653 if (TraceClassResolution) {
654 trace_class_resolution(k);
655 }
656 return k->java_mirror();
657 };
658 }
659
660
661 objArrayHandle Reflection::get_parameter_types(methodHandle method, int parameter_count, oop* return_type, TRAPS) {
662 // Allocate array holding parameter types (java.lang.Class instances)
663 objArrayOop m = oopFactory::new_objArray(SystemDictionary::Class_klass(), parameter_count, CHECK_(objArrayHandle()));
664 objArrayHandle mirrors (THREAD, m);
665 int index = 0;
666 // Collect parameter types
667 ResourceMark rm(THREAD);
668 Symbol* signature = method->signature();
669 SignatureStream ss(signature);
670 while (!ss.at_return_type()) {
671 oop mirror = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle()));
672 mirrors->obj_at_put(index++, mirror);
673 ss.next();
674 }
675 assert(index == parameter_count, "invalid parameter count");
676 if (return_type != NULL) {
677 // Collect return type as well
678 assert(ss.at_return_type(), "return type should be present");
679 *return_type = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle()));
680 }
681 return mirrors;
682 }
683
684 objArrayHandle Reflection::get_exception_types(methodHandle method, TRAPS) {
685 return method->resolved_checked_exceptions(THREAD);
686 }
687
688
689 Handle Reflection::new_type(Symbol* signature, KlassHandle k, TRAPS) {
690 // Basic types
691 BasicType type = vmSymbols::signature_type(signature);
692 if (type != T_OBJECT) {
693 return Handle(THREAD, Universe::java_mirror(type));
694 }
695
696 oop loader = InstanceKlass::cast(k())->class_loader();
697 oop protection_domain = k()->protection_domain();
698 Klass* result = SystemDictionary::resolve_or_fail(signature,
699 Handle(THREAD, loader),
700 Handle(THREAD, protection_domain),
701 true, CHECK_(Handle()));
702
703 if (TraceClassResolution) {
704 trace_class_resolution(result);
705 }
706
707 oop nt = result->java_mirror();
708 return Handle(THREAD, nt);
709 }
710
711
712 oop Reflection::new_method(methodHandle method, bool intern_name, bool for_constant_pool_access, TRAPS) {
713 // In jdk1.2.x, getMethods on an interface erroneously includes <clinit>, thus the complicated assert.
714 // Also allow sun.reflect.ConstantPool to refer to <clinit> methods as java.lang.reflect.Methods.
715 assert(!method()->is_initializer() ||
716 (for_constant_pool_access && method()->is_static()) ||
717 (method()->name() == vmSymbols::class_initializer_name()
718 && method()->method_holder()->is_interface() && JDK_Version::is_jdk12x_version()), "should call new_constructor instead");
719 instanceKlassHandle holder (THREAD, method->method_holder());
720 int slot = method->method_idnum();
721
722 Symbol* signature = method->signature();
723 int parameter_count = ArgumentCount(signature).size();
724 oop return_type_oop = NULL;
725 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, &return_type_oop, CHECK_NULL);
726 if (parameter_types.is_null() || return_type_oop == NULL) return NULL;
727
728 Handle return_type(THREAD, return_type_oop);
729
730 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL);
731
732 if (exception_types.is_null()) return NULL;
733
734 Symbol* method_name = method->name();
735 Handle name;
736 if (intern_name) {
737 // intern_name is only true with UseNewReflection
738 oop name_oop = StringTable::intern(method_name, CHECK_NULL);
739 name = Handle(THREAD, name_oop);
740 } else {
741 name = java_lang_String::create_from_symbol(method_name, CHECK_NULL);
742 }
743 if (name == NULL) return NULL;
744
745 int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
746
747 Handle mh = java_lang_reflect_Method::create(CHECK_NULL);
748
749 java_lang_reflect_Method::set_clazz(mh(), holder->java_mirror());
750 java_lang_reflect_Method::set_slot(mh(), slot);
751 java_lang_reflect_Method::set_name(mh(), name());
752 java_lang_reflect_Method::set_return_type(mh(), return_type());
753 java_lang_reflect_Method::set_parameter_types(mh(), parameter_types());
754 java_lang_reflect_Method::set_exception_types(mh(), exception_types());
755 java_lang_reflect_Method::set_modifiers(mh(), modifiers);
756 java_lang_reflect_Method::set_override(mh(), false);
757 if (java_lang_reflect_Method::has_signature_field() &&
758 method->generic_signature() != NULL) {
759 Symbol* gs = method->generic_signature();
760 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
761 java_lang_reflect_Method::set_signature(mh(), sig());
762 }
763 if (java_lang_reflect_Method::has_annotations_field()) {
764 typeArrayOop an_oop = Annotations::make_java_array(method->annotations(), CHECK_NULL);
765 java_lang_reflect_Method::set_annotations(mh(), an_oop);
766 }
767 if (java_lang_reflect_Method::has_parameter_annotations_field()) {
768 typeArrayOop an_oop = Annotations::make_java_array(method->parameter_annotations(), CHECK_NULL);
769 java_lang_reflect_Method::set_parameter_annotations(mh(), an_oop);
770 }
771 if (java_lang_reflect_Method::has_annotation_default_field()) {
772 typeArrayOop an_oop = Annotations::make_java_array(method->annotation_default(), CHECK_NULL);
773 java_lang_reflect_Method::set_annotation_default(mh(), an_oop);
774 }
775 if (java_lang_reflect_Method::has_type_annotations_field()) {
776 typeArrayOop an_oop = Annotations::make_java_array(method->type_annotations(), CHECK_NULL);
777 java_lang_reflect_Method::set_type_annotations(mh(), an_oop);
778 }
779 return mh();
780 }
781
782
783 oop Reflection::new_constructor(methodHandle method, TRAPS) {
784 assert(method()->is_initializer(), "should call new_method instead");
785
786 instanceKlassHandle holder (THREAD, method->method_holder());
787 int slot = method->method_idnum();
788
789 Symbol* signature = method->signature();
790 int parameter_count = ArgumentCount(signature).size();
791 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, NULL, CHECK_NULL);
792 if (parameter_types.is_null()) return NULL;
793
794 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL);
795 if (exception_types.is_null()) return NULL;
796
797 int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
798
799 Handle ch = java_lang_reflect_Constructor::create(CHECK_NULL);
800
801 java_lang_reflect_Constructor::set_clazz(ch(), holder->java_mirror());
802 java_lang_reflect_Constructor::set_slot(ch(), slot);
803 java_lang_reflect_Constructor::set_parameter_types(ch(), parameter_types());
804 java_lang_reflect_Constructor::set_exception_types(ch(), exception_types());
805 java_lang_reflect_Constructor::set_modifiers(ch(), modifiers);
806 java_lang_reflect_Constructor::set_override(ch(), false);
807 if (java_lang_reflect_Constructor::has_signature_field() &&
808 method->generic_signature() != NULL) {
809 Symbol* gs = method->generic_signature();
810 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
811 java_lang_reflect_Constructor::set_signature(ch(), sig());
812 }
813 if (java_lang_reflect_Constructor::has_annotations_field()) {
814 typeArrayOop an_oop = Annotations::make_java_array(method->annotations(), CHECK_NULL);
815 java_lang_reflect_Constructor::set_annotations(ch(), an_oop);
816 }
817 if (java_lang_reflect_Constructor::has_parameter_annotations_field()) {
818 typeArrayOop an_oop = Annotations::make_java_array(method->parameter_annotations(), CHECK_NULL);
819 java_lang_reflect_Constructor::set_parameter_annotations(ch(), an_oop);
820 }
821 if (java_lang_reflect_Constructor::has_type_annotations_field()) {
822 typeArrayOop an_oop = Annotations::make_java_array(method->type_annotations(), CHECK_NULL);
823 java_lang_reflect_Constructor::set_type_annotations(ch(), an_oop);
824 }
825 return ch();
826 }
827
828
829 oop Reflection::new_field(fieldDescriptor* fd, bool intern_name, TRAPS) {
830 Symbol* field_name = fd->name();
831 Handle name;
832 if (intern_name) {
833 // intern_name is only true with UseNewReflection
834 oop name_oop = StringTable::intern(field_name, CHECK_NULL);
835 name = Handle(THREAD, name_oop);
836 } else {
837 name = java_lang_String::create_from_symbol(field_name, CHECK_NULL);
838 }
839 Symbol* signature = fd->signature();
840 instanceKlassHandle holder (THREAD, fd->field_holder());
841 Handle type = new_type(signature, holder, CHECK_NULL);
842 Handle rh = java_lang_reflect_Field::create(CHECK_NULL);
843
844 java_lang_reflect_Field::set_clazz(rh(), fd->field_holder()->java_mirror());
845 java_lang_reflect_Field::set_slot(rh(), fd->index());
846 java_lang_reflect_Field::set_name(rh(), name());
847 java_lang_reflect_Field::set_type(rh(), type());
848 // Note the ACC_ANNOTATION bit, which is a per-class access flag, is never set here.
849 java_lang_reflect_Field::set_modifiers(rh(), fd->access_flags().as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS);
850 java_lang_reflect_Field::set_override(rh(), false);
851 if (java_lang_reflect_Field::has_signature_field() &&
852 fd->has_generic_signature()) {
853 Symbol* gs = fd->generic_signature();
854 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
855 java_lang_reflect_Field::set_signature(rh(), sig());
856 }
857 if (java_lang_reflect_Field::has_annotations_field()) {
858 typeArrayOop an_oop = Annotations::make_java_array(fd->annotations(), CHECK_NULL);
859 java_lang_reflect_Field::set_annotations(rh(), an_oop);
860 }
861 if (java_lang_reflect_Field::has_type_annotations_field()) {
862 typeArrayOop an_oop = Annotations::make_java_array(fd->type_annotations(), CHECK_NULL);
863 java_lang_reflect_Field::set_type_annotations(rh(), an_oop);
864 }
865 return rh();
866 }
867
868 oop Reflection::new_parameter(Handle method, int index, Symbol* sym,
869 int flags, TRAPS) {
870 Handle name;
871
872 // A null symbol here translates to the empty string
873 if(NULL != sym) {
874 name = java_lang_String::create_from_symbol(sym, CHECK_NULL);
875 } else {
876 name = java_lang_String::create_from_str("", CHECK_NULL);
877 }
878
879 Handle rh = java_lang_reflect_Parameter::create(CHECK_NULL);
880 java_lang_reflect_Parameter::set_name(rh(), name());
881 java_lang_reflect_Parameter::set_modifiers(rh(), flags);
882 java_lang_reflect_Parameter::set_executable(rh(), method());
883 java_lang_reflect_Parameter::set_index(rh(), index);
884 return rh();
885 }
886
887
888 methodHandle Reflection::resolve_interface_call(instanceKlassHandle klass, methodHandle method,
889 KlassHandle recv_klass, Handle receiver, TRAPS) {
890 assert(!method.is_null() , "method should not be null");
891
892 CallInfo info;
893 Symbol* signature = method->signature();
894 Symbol* name = method->name();
895 LinkResolver::resolve_interface_call(info, receiver, recv_klass, klass,
896 name, signature,
897 KlassHandle(), false, true,
898 CHECK_(methodHandle()));
899 return info.selected_method();
900 }
901
902
903 oop Reflection::invoke(instanceKlassHandle klass, methodHandle reflected_method,
904 Handle receiver, bool override, objArrayHandle ptypes,
905 BasicType rtype, objArrayHandle args, bool is_method_invoke, TRAPS) {
906 ResourceMark rm(THREAD);
907
908 methodHandle method; // actual method to invoke
909 KlassHandle target_klass; // target klass, receiver's klass for non-static
910
911 // Ensure klass is initialized
912 klass->initialize(CHECK_NULL);
913
914 bool is_static = reflected_method->is_static();
915 if (is_static) {
916 // ignore receiver argument
917 method = reflected_method;
918 target_klass = klass;
919 } else {
920 // check for null receiver
921 if (receiver.is_null()) {
922 THROW_0(vmSymbols::java_lang_NullPointerException());
923 }
924 // Check class of receiver against class declaring method
925 if (!receiver->is_a(klass())) {
926 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "object is not an instance of declaring class");
927 }
928 // target klass is receiver's klass
929 target_klass = KlassHandle(THREAD, receiver->klass());
930 // no need to resolve if method is private or <init>
931 if (reflected_method->is_private() || reflected_method->name() == vmSymbols::object_initializer_name()) {
932 method = reflected_method;
933 } else {
934 // resolve based on the receiver
935 if (reflected_method->method_holder()->is_interface()) {
936 // resolve interface call
937 if (ReflectionWrapResolutionErrors) {
938 // new default: 6531596
939 // Match resolution errors with those thrown due to reflection inlining
940 // Linktime resolution & IllegalAccessCheck already done by Class.getMethod()
941 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, THREAD);
942 if (HAS_PENDING_EXCEPTION) {
943 // Method resolution threw an exception; wrap it in an InvocationTargetException
944 oop resolution_exception = PENDING_EXCEPTION;
945 CLEAR_PENDING_EXCEPTION;
946 // JVMTI has already reported the pending exception
947 // JVMTI internal flag reset is needed in order to report InvocationTargetException
948 if (THREAD->is_Java_thread()) {
949 JvmtiExport::clear_detected_exception((JavaThread*) THREAD);
950 }
951 JavaCallArguments args(Handle(THREAD, resolution_exception));
952 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(),
953 vmSymbols::throwable_void_signature(),
954 &args);
955 }
956 } else {
957 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, CHECK_(NULL));
958 }
959 } else {
960 // if the method can be overridden, we resolve using the vtable index.
961 assert(!reflected_method->has_itable_index(), "");
962 int index = reflected_method->vtable_index();
963 method = reflected_method;
964 if (index != Method::nonvirtual_vtable_index) {
965 // target_klass might be an arrayKlassOop but all vtables start at
966 // the same place. The cast is to avoid virtual call and assertion.
967 InstanceKlass* inst = (InstanceKlass*)target_klass();
968 method = methodHandle(THREAD, inst->method_at_vtable(index));
969 }
970 if (!method.is_null()) {
971 // Check for abstract methods as well
972 if (method->is_abstract()) {
973 // new default: 6531596
974 if (ReflectionWrapResolutionErrors) {
975 ResourceMark rm(THREAD);
976 Handle h_origexception = Exceptions::new_exception(THREAD,
977 vmSymbols::java_lang_AbstractMethodError(),
978 Method::name_and_sig_as_C_string(target_klass(),
979 method->name(),
980 method->signature()));
981 JavaCallArguments args(h_origexception);
982 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(),
983 vmSymbols::throwable_void_signature(),
984 &args);
985 } else {
986 ResourceMark rm(THREAD);
987 THROW_MSG_0(vmSymbols::java_lang_AbstractMethodError(),
988 Method::name_and_sig_as_C_string(target_klass(),
989 method->name(),
990 method->signature()));
991 }
992 }
993 }
994 }
995 }
996 }
997
998 // I believe this is a ShouldNotGetHere case which requires
999 // an internal vtable bug. If you ever get this please let Karen know.
1000 if (method.is_null()) {
1001 ResourceMark rm(THREAD);
1002 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
1003 Method::name_and_sig_as_C_string(klass(),
1004 reflected_method->name(),
1005 reflected_method->signature()));
1006 }
1007
1008 // In the JDK 1.4 reflection implementation, the security check is
1009 // done at the Java level
1010 if (!(JDK_Version::is_gte_jdk14x_version() && UseNewReflection)) {
1011
1012 // Access checking (unless overridden by Method)
1013 if (!override) {
1014 if (!(klass->is_public() && reflected_method->is_public())) {
1015 bool access = Reflection::reflect_check_access(klass(), reflected_method->access_flags(), target_klass(), is_method_invoke, CHECK_NULL);
1016 if (!access) {
1017 return NULL; // exception
1018 }
1019 }
1020 }
1021
1022 } // !(Universe::is_gte_jdk14x_version() && UseNewReflection)
1023
1024 assert(ptypes->is_objArray(), "just checking");
1025 int args_len = args.is_null() ? 0 : args->length();
1026 // Check number of arguments
1027 if (ptypes->length() != args_len) {
1028 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "wrong number of arguments");
1029 }
1030
1031 // Create object to contain parameters for the JavaCall
1032 JavaCallArguments java_args(method->size_of_parameters());
1033
1034 if (!is_static) {
1035 java_args.push_oop(receiver);
1036 }
1037
1038 for (int i = 0; i < args_len; i++) {
1039 oop type_mirror = ptypes->obj_at(i);
1040 oop arg = args->obj_at(i);
1041 if (java_lang_Class::is_primitive(type_mirror)) {
1042 jvalue value;
1043 BasicType ptype = basic_type_mirror_to_basic_type(type_mirror, CHECK_NULL);
1044 BasicType atype = unbox_for_primitive(arg, &value, CHECK_NULL);
1045 if (ptype != atype) {
1046 widen(&value, atype, ptype, CHECK_NULL);
1047 }
1048 switch (ptype) {
1049 case T_BOOLEAN: java_args.push_int(value.z); break;
1050 case T_CHAR: java_args.push_int(value.c); break;
1051 case T_BYTE: java_args.push_int(value.b); break;
1052 case T_SHORT: java_args.push_int(value.s); break;
1053 case T_INT: java_args.push_int(value.i); break;
1054 case T_LONG: java_args.push_long(value.j); break;
1055 case T_FLOAT: java_args.push_float(value.f); break;
1056 case T_DOUBLE: java_args.push_double(value.d); break;
1057 default:
1058 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
1059 }
1060 } else {
1061 if (arg != NULL) {
1062 Klass* k = java_lang_Class::as_Klass(type_mirror);
1063 if (!arg->is_a(k)) {
1064 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
1065 }
1066 }
1067 Handle arg_handle(THREAD, arg); // Create handle for argument
1068 java_args.push_oop(arg_handle); // Push handle
1069 }
1070 }
1071
1072 assert(java_args.size_of_parameters() == method->size_of_parameters(), "just checking");
1073
1074 // All oops (including receiver) is passed in as Handles. An potential oop is returned as an
1075 // oop (i.e., NOT as an handle)
1076 JavaValue result(rtype);
1077 JavaCalls::call(&result, method, &java_args, THREAD);
1078
1079 if (HAS_PENDING_EXCEPTION) {
1080 // Method threw an exception; wrap it in an InvocationTargetException
1081 oop target_exception = PENDING_EXCEPTION;
1082 CLEAR_PENDING_EXCEPTION;
1083 // JVMTI has already reported the pending exception
1084 // JVMTI internal flag reset is needed in order to report InvocationTargetException
1085 if (THREAD->is_Java_thread()) {
1086 JvmtiExport::clear_detected_exception((JavaThread*) THREAD);
1087 }
1088
1089 JavaCallArguments args(Handle(THREAD, target_exception));
1090 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(),
1091 vmSymbols::throwable_void_signature(),
1092 &args);
1093 } else {
1094 if (rtype == T_BOOLEAN || rtype == T_BYTE || rtype == T_CHAR || rtype == T_SHORT)
1095 narrow((jvalue*) result.get_value_addr(), rtype, CHECK_NULL);
1096 return box((jvalue*) result.get_value_addr(), rtype, THREAD);
1097 }
1098 }
1099
1100
1101 void Reflection::narrow(jvalue* value, BasicType narrow_type, TRAPS) {
1102 switch (narrow_type) {
1103 case T_BOOLEAN:
1104 value->z = (jboolean) (value->i & 1);
1105 return;
1106 case T_BYTE:
1107 value->b = (jbyte) value->i;
1108 return;
1109 case T_CHAR:
1110 value->c = (jchar) value->i;
1111 return;
1112 case T_SHORT:
1113 value->s = (jshort) value->i;
1114 return;
1115 default:
1116 break; // fail
1117 }
1118 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
1119 }
1120
1121
1122 BasicType Reflection::basic_type_mirror_to_basic_type(oop basic_type_mirror, TRAPS) {
1123 assert(java_lang_Class::is_primitive(basic_type_mirror), "just checking");
1124 return java_lang_Class::primitive_type(basic_type_mirror);
1125 }
1126
1127 // This would be nicer if, say, java.lang.reflect.Method was a subclass
1128 // of java.lang.reflect.Constructor
1129
1130 oop Reflection::invoke_method(oop method_mirror, Handle receiver, objArrayHandle args, TRAPS) {
1131 oop mirror = java_lang_reflect_Method::clazz(method_mirror);
1132 int slot = java_lang_reflect_Method::slot(method_mirror);
1133 bool override = java_lang_reflect_Method::override(method_mirror) != 0;
1134 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Method::parameter_types(method_mirror)));
1135
1136 oop return_type_mirror = java_lang_reflect_Method::return_type(method_mirror);
1137 BasicType rtype;
1138 if (java_lang_Class::is_primitive(return_type_mirror)) {
1139 rtype = basic_type_mirror_to_basic_type(return_type_mirror, CHECK_NULL);
1140 } else {
1141 rtype = T_OBJECT;
1142 }
1143
1144 instanceKlassHandle klass(THREAD, java_lang_Class::as_Klass(mirror));
1145 Method* m = klass->method_with_idnum(slot);
1146 if (m == NULL) {
1147 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke");
1148 }
1149 methodHandle method(THREAD, m);
1150
1151 return invoke(klass, method, receiver, override, ptypes, rtype, args, true, THREAD);
1152 }
1153
1154
1155 oop Reflection::invoke_constructor(oop constructor_mirror, objArrayHandle args, TRAPS) {
1156 oop mirror = java_lang_reflect_Constructor::clazz(constructor_mirror);
1157 int slot = java_lang_reflect_Constructor::slot(constructor_mirror);
1158 bool override = java_lang_reflect_Constructor::override(constructor_mirror) != 0;
1159 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Constructor::parameter_types(constructor_mirror)));
1160
1161 instanceKlassHandle klass(THREAD, java_lang_Class::as_Klass(mirror));
1162 Method* m = klass->method_with_idnum(slot);
1163 if (m == NULL) {
1164 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke");
1165 }
1166 methodHandle method(THREAD, m);
1167 assert(method->name() == vmSymbols::object_initializer_name(), "invalid constructor");
1168
1169 // Make sure klass gets initialize
1170 klass->initialize(CHECK_NULL);
1171
1172 // Create new instance (the receiver)
1173 klass->check_valid_for_instantiation(false, CHECK_NULL);
1174 Handle receiver = klass->allocate_instance_handle(CHECK_NULL);
1175
1176 // Ignore result from call and return receiver
1177 invoke(klass, method, receiver, override, ptypes, T_VOID, args, false, CHECK_NULL);
1178 return receiver();
1179 }